Bumping gaia.json for 6 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b10aefb60249
Author: ochameau <poirot.alex@gmail.com>
Desc: Merge pull request #12838 from kumar303/dev-payments

Bug 855143 - Add Marketplace dev apps r=ochameau

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https://hg.mozilla.org/integration/gaia-central/rev/14eed39bcfd7
Author: Kumar McMillan <kumar.mcmillan@gmail.com>
Desc: Add Marketplace dev apps (bug 855143)

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https://hg.mozilla.org/integration/gaia-central/rev/1fdd5fd738c4
Author: Ran Ben Aharon <ran@everything.me>
Desc: Merge pull request #13400 from EverythingMe/marketapp

[Bug 925806] Marketplace results to open in the marketplace app [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/0336e3421638
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: [Bug 925806] Marketplace results to open in the marketplace app [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/63093edf4c7e
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #13441 from eeejay/bug-935708

Bug 935708 - [homescreen] Use querySelector instead of querySelectorAll ...

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https://hg.mozilla.org/integration/gaia-central/rev/ffdb8b303cbb
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 935708 - [homescreen] Use querySelector instead of querySelectorAll in save_bookmark_test.js